title: Attention deficit disorder and the mediating effect of age on academic and behavioral variables.
abstract: Seventy-nine children, independently diagnosed as having attention deficit disorder (ADD) with or without hyperactivity and ranging in age from 6 years, 0 months, to 12 years, 11 months, were administered the Wechsler Intelligence Scale for Children-Revised (WISC-R), the Wide Range Achievement Test (WRAT), and the Child Behavior Checklist (CBC). Multiple regression analyses indicated a significant multiple correlation between age and achievement variables (R = 0.42, p = 0.003) and age and behavioral (CBC) variables (R = 0.55, p = 0.01). Post hoc analyses indicated that much of this variance was accounted for by a significant negative association between age and Full Scale IQ-WRAT Arithmetic difference scores, and significant positive correlations between age and scores on the Social Withdrawal and Uncommunicative scales from the CBC. A nonparametric chi-square analysis indicated that older children with ADD are significantly more likely (p = 0.037) than younger ADD children to have a discrepancy of 15 or more points between IQ and math achievement scores. Results suggest that older ADD children are more likely than younger ADD children to experience academic and socioemotional difficulties.
authors.affiliation: Learning Diagnostic Center, Austin, Texas 78705.
authors.forename: N L
authors.initials: NL
authors.lastname: Nussbaum
authors.forename: M L
authors.initials: ML
authors.lastname: Grant
authors.forename: M J
authors.initials: MJ
authors.lastname: Roman
authors.forename: J H
authors.initials: JH
authors.lastname: Poole
authors.forename: E D
authors.initials: ED
authors.lastname: Bigler
mesh_terms: D000124:Achievement; D000367:Age Factors; D001289:Attention Deficit Disorder with Hyperactivity / Q000150:complications*; D002648:Child; D002653:Child Behavior Disorders / Q000150:complications; D006801:Humans; D007360:Intelligence; D007859:Learning Disabilities / Q000150:complications*; D008297:Male; D008433:Mathematics